getenv

src/lindbergh/hook.c

@@ -43,6 +43,7 @@
 int hooks[5] = {-1, -1, -1, -1};
 FILE *fileHooks[3] = {NULL, NULL, NULL};
 int fileRead[3] = {0, 0, 0};
+char envpath[100];
 uint32_t elf_crc = 0;
 
 cpuvendor cpu_vendor = {0};
@@ -131,7 +132,6 @@ static void handleSegfault(int signal, siginfo_t *info, void *ptr)
     }
 }
 
-
 void __attribute__((constructor)) hook_init()
 {
     printf("SEGA Lindbergh Loader\nRobert Dilley 2022\nNot for public consumption\n\n");
@@ -615,12 +615,15 @@ uint32_t get_crc32(const char *s,size_t n)
 {
     uint32_t crc = 0xFFFFFFFF;
 
-    for(size_t i=0;i<n;i++) {
+    for (size_t i = 0; i < n; i++)
+    {
         char ch = s[i];
-	for(size_t j=0;j<8;j++) {
+        for (size_t j = 0; j < 8; j++)
+        {
             uint32_t b = (ch ^ crc) & 1;
             crc >>= 1;
-	    if(b) crc=crc^0xEDB88320;
+            if (b)
+                crc = crc ^ 0xEDB88320;
             ch >>= 1;
         }
     }
@@ -662,6 +665,33 @@ int setenv(const char *name, const char *value, int overwrite)
     return _setenv(name, value, overwrite);
 }
 
+/**
+ * Fake the TEA_DIR environment variable to games that require it to run
+*/
+char *getenv(const char *name)
+{
+    char *(*_getenv)(const char *name) = dlsym(RTLD_NEXT, "getenv");
+
+    if ((strcmp(name, "TEA_DIR") == 0) && getConfig()->game == VT3)
+    {
+        if (getcwd(envpath, 100) == NULL)
+            return "";
+        char *ptr = strrchr(envpath, '/');
+        if (ptr == NULL)
+            return "";
+        *ptr = '\0';
+        return envpath;
+    }
+    else if (strcmp(name, "TEA_DIR") == 0)
+    {
+        if (getcwd(envpath, 100) == NULL)
+            return "";
+        return envpath;
+    }
+
+    return _getenv(name);
+}
+
 /**
  * Stop the game unsetting the DISPLAY environment variable
  */

src/lindbergh/patch.c

@@ -453,6 +453,7 @@ int initPatch()
         detourFunction(0x0831c99e, amDongleUpdate);
         detourFunction(0x0831c5d7, amDipswGetData);
         detourFunction(0x0831c64f, stub0);
+        setVariable(0x0827ae1b, 0x34891beb); //Disable Fullscreen
     }
     break;
     default: